Re: upgrade OL6 tot OL7 within Cluster

From: Ludovico Caldara <ludovico.caldara_at_gmail.com>
Date: Fri, 18 Dec 2015 09:49:14 +0100
Message-ID: <CALSQGr+tjc8Dw5SZkrZGZMzF0tX-N68Pn9b_0ueNZTajtBjZ7w_at_mail.gmail.com>

Hi,
Are you running Oracle on a GI Cluster? If yes, and you cannot afford to buy new hardware, it would be better to delete a node from the cluster, reinstall it with the new release, add it back to the cluster, then repeat the task for the remaining nodes. With this upgrade path you can easily migrate from an OS level (and/or Linux flavor) to another one without downtime.

From a cluster point of view, you need to disable the new OL7 naming for the interfaces, this because the interface name for the private interconnect must match among all the cluster nodes. oifcfg setif for the private interconnect needs you to reboot the cluster, so keep it in mind if you want to use the new naming.

Off course, you must comply with the certification matrix -> OL7 is certified with 12.1.0.2.

You can find more information about hybrid OS cluster and changing public interfaces here:
http://www.ludovicocaldara.net/dba/rac-suse-to-rhel/ http://www.ludovicocaldara.net/dba/convert-interconnect-to-haip/

If you need further help feel free to DM me ;-)

Cheers

-- 
Ludo


2015-12-18 9:00 GMT+01:00 Bernhard de Cock Buning - GRID-IT <
bdcbuning_at_grid-it.nl>:



> Hi Mark,

>

> Thanks for your reply, it triggered me to double check the docs and in

> chapter 4 I found this:

>

> 4.1 Conditions for Performing an Inplace Upgrade

>

> Inplace upgrades are supported only for systems that run Oracle Linux 6

> Update 5 or later. The following conditions must also be met:

>

>    -

>

>    The system must meet the minimum installation requirements for Oracle

>    Linux 7, see Section 1.1, “System Requirements”

>    <https://docs.oracle.com/cd/E52668_01/E54695/html/ol7-install-requirements.html>

>    .

>    -

>

>    The Oracle Linux 6 system has been completely updated from the

>    ol6_x86_64_latest channel or ol6_latest repository.

>    -

>

>    Oracle Unbreakable Enterprise Kernel Release 3 (UEK R3) must be

>    installed on the system and must be the default boot kernel. Upgrading from

>    UEK R2 is not supported.

>    -

>

>    The Oracle Linux 6 system must have been installed using the Minimal

>    set of software.

>    -

>

>    No Oracle product stack is present on the system.

>

>

> Thanks, I know enough for now!

>

> Bernhard de Cock Buning

>

>

> Op 18 dec. 2015, om 05:45 heeft Mark J. Bobak <mark_at_bobak.net> het

> volgende geschreven:

>

> I was just reading about this a couple of days ago.  Upgrade from OL6 to

> OL7 without reinstall is very limited.  O/S had to have been installed with

> Minimum configuration, no Oracle stack can be installed, etc.

>

> My guess is that relink should fix any issues with Oracle dB binaries, but

> from a supportability point of view, you would not be in compliance.

>

> You're probably better off building a new cluster and migrating to it.

>

> Hope that helps,

>

> -Mark

>

> On Thu, Dec 17, 2015, 23:10 Bernhard de Cock Buning - GRID-IT <

> bdcbuning_at_grid-it.nl> wrote:

>

>> Hello,

>>

>> I am wondering if their are user who have experiences performing an OS

>> upgrade from ol6 to ol7.

>> Please share you experience, was it an easy taks, did you relink Oracle

>> after the upgrade? How much time did it took. Did you run into issues?

>>

>> Thank you!

>> Bernhard

>>

>

>


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Received on Fri Dec 18 2015 - 09:49:14 CET